Apparatus for recovering vehicles used in application of lacquer, japan, and other coatings.



W. 's. ROWLAND.

APPARATUS FOR REGOVERING VEHICLES USED IN APPLICATION OF LAGQUER, JAPAN,AND

OTHER COATINGS. A

Patented July 29, 1913.

AI'PLIGAT ION FILED MAR. l, 1910.

'ferred form of the apparatus I UNITED STATES PATENT OFFICE.

WILLIAM shutout. ROWLAND, or NEW BRITAIN,

STANLEY wonxs, or NEW BRITAIN,

NECTICUT.

comvnorrcur, Assronon To THE comvncrrcu'r, A CORPORATION or con-ArrAnA'rus FOR nncovnnmc vnmcnas nsnn INArPLICATIoN or LACQUER, JAPAN,AND ornnn commas.

Specification of Letters Patent.

Patented July 29, 1913.

Application filed March 1, 1910. Serial No. 546,732.

To all whom it may concern Bert known that I, WILLIAM S. ROWLAND, acitizen of the United States, residing at New Brltain. county ofHartford, State of Connecticut, have invented certain new and usefulImprovements in .Apparatus for Recovering Vehicles Used in Applicationof Lacquer, Japan, and other Ooallngs, of which the following is a full,clear, and exact description.

My invention relates to a means and process for the recovery of thevehicle or solvent used in the a-pplica-tion'of lacquer, japan and othercoatings to material or manufactured articles.

The objectof the invention is to secure economy.

In the accompanying drawings Figure 1 is a conventional showing of myimproved apparatus, said view beinpartly in section. larged and showingconventionally one of the features of construction.

In the drawing-1 conventionally represents what I mayterm a kiln ordrying chamber. 1

2 is a conventional representation of a condenser of any suitable form.

3 represents a blower, pump or exhauster,

or equivalent means, so associated with the kiln and condenser as tooperate in a manner to cause the vapors in the kiln to flow to thecondenser. In the particular apparatus shown this blower 3 is placedbetween the kiln chamber 1 and the condenser 2 and located in a suitableconduit 4.

1 4 are openings in and near one end of the pipe 4; arranged to receivethe vapors,

these openings being disposed in any suitable location best purposes. v

2 represents the point where the conduit or pipe 4 is connected with thecondenser 2.

As isindicated, the kiln chamber 1 is bounded by a suitable wall 5. Inthe preprovide another chamber 6 which I will term the dipping chambe-rwherein the application of the material to the articles to curs. t

7 conventionally represents a partition which preferably separates thechambers 1 an 6.

adapted for the intended exit of the good 'the entrance and exitpassages in the outer tively ti ght,v while,

Fig. 2 is a detail View, slightly en-- be coated oc- In the particularform of my invention shown herein. 8 represents a belt or chain.conveyer upon which the articles tobe coated. may be placed or hung atsome conven-lentpoint' outside of the apparatus and by WhlCh saidarticles are conveyed first into the dipping chamber 6, where saidarticles may be lowered into a dipping tank 9, and then passed on over adripping board 11 into the kiln chamber 1, wherein the articles aredried. Suitable passages trapped in any suitable way are provided in thewalls of the chambersto permit the entrance and and it is preferred thatwalls of the chamber should be comparaas will later be seen, this is ofno material consequence as to the passages in the partition 7, where themeans for accelerating the drying is such as later described. 7

10 represents conventionally one length of a heating coil located in thechamber 1, which serves as one means for accelerating the drying of thegoods within the kiln chamber 1 by raising the temperature therein.Obviously, other suitable means may be substituted in place of saidheater.

Traps may be located at whatever positions it is desirable to have them,and I- have shown in F ig. 2 conventionally one of the many forms oftraps which may be employed, in which 12 represents the revolvingshutter element thereof protectingthc entrance passage through the wall5. Since I lay no claim to any specific trap construction, a furtherdescription thereof is needless.

In theprocess of covering material or manufactured articles withlacquer, apan andothersimi'lar coatings, an appropriate solvent orvehicle is employed, which upon evaporation leaves upon the material orarticles the desired coating, prevlously dissolved and rendered fluid bythe aforesaid solvent or temporarily thinned by the aforesaid vehicle tofacilitate. application. In other words, it should be understood thatthe coating mixture consists-broadly of two principal elements, viz.,the material which isto be retained upon the article and the vehicle(frequently a solvent) by which said material is'temporarily thinned forthe purposes of application. The vehicle or,

4 indeed,

be suitably gated, if desired.

solvent is therefore in the majority of cases only a temporary expedientand in such in stances is permitted, or made to, evaporate. Heretofore,the vapors have become lost and dissipated whereas by my process it isthe intention that these vapors shall be recovered and retained wherebygreat economies are effected. In the apparatus such as shown the wall 5constitutes as tight an in-' closure as possible, and while notnecessarily air-tight, it is nevertheless constructed with as fewopenings as possible to provide for the properentrance and exit of thearticles to-be coated, which openings may The blower 3 preferablyprovides a means for continuous exhaustion of the kiln chamber, therebycreating a very slightly reduced pressure therein. In this way any draftthrough the openings which provide entrance and exit for the goods is ina direction to prevent the escape of vapor or gas caused by evaporationwithin the chamber or chambers.

From the foregoing it will be seen that when the apparatus is in'use thevolatilized or gasified solvent or vehicle is restrained within theaforesaid chambers and is permitted to escape only through the aforesaidpipe 4, which conducts said volatilized or .gasified element to thecondenser wherein it is transformed to a liquid state, in which latterform it may be retained and preserved for further use;

It isapparent that when this process is practised on a substantial scalegreat commercial economies heretofore unattained are secured.

It should be understood that my process broadly should not be limited tothe employment of any particular apparatus, and

paratus claimed that a separate dipping chamber be associated with thekiln chamber. It is however very desirable that an apparatus embodyingthe elements broadly speaking referred to herein be employed for tice ofthe process and method described, and that various modifications ma beresorted to without departing from t e spirit or scope of the invention.

What I claim is: 1. An apparatus for the recovering o it isnot'essential to the broad ap-.

uid form,

during said heating,

solvents used as a vehicle for coating mania factured articles withjapan, lacquer or other coating, comprisinga kiln for heating thecoating material and driving ed and. confining the vapor of the solventthereof, in combination witha carrier extending partially within saidkiln and by which the articles to be coated are passed through saidkiln,

a tank containing the coating material so placed relatively to thecarrier that the articles to be, coated may be passed therethroughbefore; entering the kiln, an in closure for the space in which saidtank may be placed and within which inclosure the coated articles may beallowed to drip be fore entering the'kiln, said inclosure being arrangedadjacent to' the kiln and connected therewith by a passage, trappedpassages for allowing the articles on the carrier to enter and departfrom the dipping inclosure and the kiln with the least admission of airand loss of vapor-laden air, and means for transferring the solventvapors and the air containing them to a condenser, and a condenser bywhich said solvent vapors are converted into liquid form.

2. An apparatus for the recovering of solvents used as a vehicle forcoating manufactured articles with japan, lac uer or other coating,comprising a kiln for eating the coating material and driving oflt' andconfining the vaporof the solvent thereof, in combination with a carrierextending partially within said kiln and by which the articles to becoated are passed through said kiln, a tank containing the coatingmaterial so placed relatively to the carrier that the articles to becoated may be passed therethrough before entering the kiln, an inclosurefor the space in which said tank re:

be placed and within which inclosure ii coated articles may be allowedtodrip be fore entering the kiln, said inclosure being arranged adjacentto the kilnand connecte therewith by a passage, trapped passagesforallowing the articles on the carrier to enter and depart from thedipping'inclosure' and the kiln with the least admission of air and lossof vapor-laden air, means for transferring the solvent vapors and theair containing them to a condenser, a condenser by which solvent vaporsare converted into liqand a trap for the passage from the dipping.inclosure into the kiln through which the coated articles are passed bysaid carrier.

3. In an apparatus for the recovering of a solvent used as a vehicle forcoating manufactured articles with japan, lacquer or other coating,which comprises a for heating the coating material and for confining thevapor of the solvent driven oif carrier extending partially within saidkiln and by which articles to be coated are passed incorribination witha therethrough, a second inclosure adjacent to for said passage, acondenser by which the 10 said heating kiln and through which saidcarrier also passes, with means therein for applying a coating to thearticles to be coated as they pass through said inclosure,

a passage connecting said second inclosure with said kiln through whichthe coated artlcles are conveyed by said carrier from said secondinclosure to said kiln, with a trap solventapors are converted intoliquid form, and means for vent vapors 1n the klln'to said condenser.

transferring; the sol- WILLIAM SAMUEL ROWLAN D.

Vitnesses ERNEST V. PELTON, C. F. BENNETT.

